469 lines
19 KiB
C
469 lines
19 KiB
C
|
// Copyright 2017 The Abseil Authors.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
// This file defines dynamic annotations for use with dynamic analysis tool
|
||
|
|
// such as valgrind, PIN, etc.
|
||
|
|
//
|
||
|
|
// Dynamic annotation is a source code annotation that affects the generated
|
||
|
|
// code (that is, the annotation is not a comment). Each such annotation is
|
||
|
|
// attached to a particular instruction and/or to a particular object (address)
|
||
|
|
// in the program.
|
||
|
|
//
|
||
|
|
// The annotations that should be used by users are macros in all upper-case
|
||
|
|
// (e.g., ABSL_ANNOTATE_THREAD_NAME).
|
||
|
|
//
|
||
|
|
// Actual implementation of these macros may differ depending on the dynamic
|
||
|
|
// analysis tool being used.
|
||
|
|
//
|
||
|
|
// This file supports the following configurations:
|
||
|
|
// - Dynamic Annotations enabled (with static thread-safety warnings disabled).
|
||
|
|
// In this case, macros expand to functions implemented by Thread Sanitizer,
|
||
|
|
// when building with TSan. When not provided an external implementation,
|
||
|
|
// dynamic_annotations.cc provides no-op implementations.
|
||
|
|
//
|
||
|
|
// - Static Clang thread-safety warnings enabled.
|
||
|
|
// When building with a Clang compiler that supports thread-safety warnings,
|
||
|
|
// a subset of annotations can be statically-checked at compile-time. We
|
||
|
|
// expand these macros to static-inline functions that can be analyzed for
|
||
|
|
// thread-safety, but afterwards elided when building the final binary.
|
||
|
|
//
|
||
|
|
// - All annotations are disabled.
|
||
|
|
// If neither Dynamic Annotations nor Clang thread-safety warnings are
|
||
|
|
// enabled, then all annotation-macros expand to empty.
|
||
|
|
|
||
|
|
#ifndef ABSL_BASE_DYNAMIC_ANNOTATIONS_H_
|
||
|
|
#define ABSL_BASE_DYNAMIC_ANNOTATIONS_H_
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include "absl/base/attributes.h"
|
||
|
|
#include "absl/base/config.h"
|
||
|
|
#ifdef __cplusplus
|
||
|
|
#include "absl/base/macros.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Decide which features are enabled.
|
||
|
|
|
||
|
|
#ifdef ABSL_HAVE_THREAD_SANITIZER
|
||
|
|
|
||
|
|
#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 1
|
||
|
|
#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 1
|
||
|
|
#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 1
|
||
|
|
#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
|
||
|
|
#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED 1
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 0
|
||
|
|
#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 0
|
||
|
|
#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 0
|
||
|
|
|
||
|
|
// Clang provides limited support for static thread-safety analysis through a
|
||
|
|
// feature called Annotalysis. We configure macro-definitions according to
|
||
|
|
// whether Annotalysis support is available. When running in opt-mode, GCC
|
||
|
|
// will issue a warning, if these attributes are compiled. Only include them
|
||
|
|
// when compiling using Clang.
|
||
|
|
|
||
|
|
#if defined(__clang__)
|
||
|
|
#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 1
|
||
|
|
#if !defined(SWIG)
|
||
|
|
#define ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED 1
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Read/write annotations are enabled in Annotalysis mode; disabled otherwise.
|
||
|
|
#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED \
|
||
|
|
ABSL_INTERNAL_ANNOTALYSIS_ENABLED
|
||
|
|
|
||
|
|
#endif // ABSL_HAVE_THREAD_SANITIZER
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
#define ABSL_INTERNAL_BEGIN_EXTERN_C extern "C" {
|
||
|
|
#define ABSL_INTERNAL_END_EXTERN_C } // extern "C"
|
||
|
|
#define ABSL_INTERNAL_GLOBAL_SCOPED(F) ::F
|
||
|
|
#define ABSL_INTERNAL_STATIC_INLINE inline
|
||
|
|
#else
|
||
|
|
#define ABSL_INTERNAL_BEGIN_EXTERN_C // empty
|
||
|
|
#define ABSL_INTERNAL_END_EXTERN_C // empty
|
||
|
|
#define ABSL_INTERNAL_GLOBAL_SCOPED(F) F
|
||
|
|
#define ABSL_INTERNAL_STATIC_INLINE static inline
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Define race annotations.
|
||
|
|
|
||
|
|
#if ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 1
|
||
|
|
// Some of the symbols used in this section (e.g. AnnotateBenignRaceSized) are
|
||
|
|
// defined by the compiler-based santizer implementation, not by the Abseil
|
||
|
|
// library. Therefore they do not use ABSL_INTERNAL_C_SYMBOL.
|
||
|
|
|
||
|
|
// -------------------------------------------------------------
|
||
|
|
// Annotations that suppress errors. It is usually better to express the
|
||
|
|
// program's synchronization using the other annotations, but these can be used
|
||
|
|
// when all else fails.
|
||
|
|
|
||
|
|
// Report that we may have a benign race at `pointer`, with size
|
||
|
|
// "sizeof(*(pointer))". `pointer` must be a non-void* pointer. Insert at the
|
||
|
|
// point where `pointer` has been allocated, preferably close to the point
|
||
|
|
// where the race happens. See also ABSL_ANNOTATE_BENIGN_RACE_STATIC.
|
||
|
|
#define ABSL_ANNOTATE_BENIGN_RACE(pointer, description) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized) \
|
||
|
|
(__FILE__, __LINE__, pointer, sizeof(*(pointer)), description)
|
||
|
|
|
||
|
|
// Same as ABSL_ANNOTATE_BENIGN_RACE(`address`, `description`), but applies to
|
||
|
|
// the memory range [`address`, `address`+`size`).
|
||
|
|
#define ABSL_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized) \
|
||
|
|
(__FILE__, __LINE__, address, size, description)
|
||
|
|
|
||
|
|
// Enable (`enable`!=0) or disable (`enable`==0) race detection for all threads.
|
||
|
|
// This annotation could be useful if you want to skip expensive race analysis
|
||
|
|
// during some period of program execution, e.g. during initialization.
|
||
|
|
#define ABSL_ANNOTATE_ENABLE_RACE_DETECTION(enable) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateEnableRaceDetection) \
|
||
|
|
(__FILE__, __LINE__, enable)
|
||
|
|
|
||
|
|
// -------------------------------------------------------------
|
||
|
|
// Annotations useful for debugging.
|
||
|
|
|
||
|
|
// Report the current thread `name` to a race detector.
|
||
|
|
#define ABSL_ANNOTATE_THREAD_NAME(name) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateThreadName)(__FILE__, __LINE__, name)
|
||
|
|
|
||
|
|
// -------------------------------------------------------------
|
||
|
|
// Annotations useful when implementing locks. They are not normally needed by
|
||
|
|
// modules that merely use locks. The `lock` argument is a pointer to the lock
|
||
|
|
// object.
|
||
|
|
|
||
|
|
// Report that a lock has been created at address `lock`.
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_CREATE(lock) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreate)(__FILE__, __LINE__, lock)
|
||
|
|
|
||
|
|
// Report that a linker initialized lock has been created at address `lock`.
|
||
|
|
#ifdef ABSL_HAVE_THREAD_SANITIZER
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreateStatic) \
|
||
|
|
(__FILE__, __LINE__, lock)
|
||
|
|
#else
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock) \
|
||
|
|
ABSL_ANNOTATE_RWLOCK_CREATE(lock)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Report that the lock at address `lock` is about to be destroyed.
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_DESTROY(lock) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockDestroy)(__FILE__, __LINE__, lock)
|
||
|
|
|
||
|
|
// Report that the lock at address `lock` has been acquired.
|
||
|
|
// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockAcquired) \
|
||
|
|
(__FILE__, __LINE__, lock, is_w)
|
||
|
|
|
||
|
|
// Report that the lock at address `lock` is about to be released.
|
||
|
|
// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_RELEASED(lock, is_w) \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockReleased) \
|
||
|
|
(__FILE__, __LINE__, lock, is_w)
|
||
|
|
|
||
|
|
// Apply ABSL_ANNOTATE_BENIGN_RACE_SIZED to a static variable `static_var`.
|
||
|
|
#define ABSL_ANNOTATE_BENIGN_RACE_STATIC(static_var, description) \
|
||
|
|
namespace { \
|
||
|
|
class static_var##_annotator { \
|
||
|
|
public: \
|
||
|
|
static_var##_annotator() { \
|
||
|
|
ABSL_ANNOTATE_BENIGN_RACE_SIZED(&static_var, sizeof(static_var), \
|
||
|
|
#static_var ": " description); \
|
||
|
|
} \
|
||
|
|
}; \
|
||
|
|
static static_var##_annotator the##static_var##_annotator; \
|
||
|
|
} // namespace
|
||
|
|
|
||
|
|
// Function prototypes of annotations provided by the compiler-based sanitizer
|
||
|
|
// implementation.
|
||
|
|
ABSL_INTERNAL_BEGIN_EXTERN_C
|
||
|
|
void AnnotateRWLockCreate(const char* file, int line,
|
||
|
|
const volatile void* lock);
|
||
|
|
void AnnotateRWLockCreateStatic(const char* file, int line,
|
||
|
|
const volatile void* lock);
|
||
|
|
void AnnotateRWLockDestroy(const char* file, int line,
|
||
|
|
const volatile void* lock);
|
||
|
|
void AnnotateRWLockAcquired(const char* file, int line,
|
||
|
|
const volatile void* lock, long is_w); // NOLINT
|
||
|
|
void AnnotateRWLockReleased(const char* file, int line,
|
||
|
|
const volatile void* lock, long is_w); // NOLINT
|
||
|
|
void AnnotateBenignRace(const char* file, int line,
|
||
|
|
const volatile void* address, const char* description);
|
||
|
|
void AnnotateBenignRaceSized(const char* file, int line,
|
||
|
|
const volatile void* address, size_t size,
|
||
|
|
const char* description);
|
||
|
|
void AnnotateThreadName(const char* file, int line, const char* name);
|
||
|
|
void AnnotateEnableRaceDetection(const char* file, int line, int enable);
|
||
|
|
ABSL_INTERNAL_END_EXTERN_C
|
||
|
|
|
||
|
|
#else // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 0
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_CREATE(lock) // empty
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock) // empty
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_DESTROY(lock) // empty
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) // empty
|
||
|
|
#define ABSL_ANNOTATE_RWLOCK_RELEASED(lock, is_w) // empty
|
||
|
|
#define ABSL_ANNOTATE_BENIGN_RACE(address, description) // empty
|
||
|
|
#define ABSL_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) // empty
|
||
|
|
#define ABSL_ANNOTATE_THREAD_NAME(name) // empty
|
||
|
|
#define ABSL_ANNOTATE_ENABLE_RACE_DETECTION(enable) // empty
|
||
|
|
#define ABSL_ANNOTATE_BENIGN_RACE_STATIC(static_var, description) // empty
|
||
|
|
|
||
|
|
#endif // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Define memory annotations.
|
||
|
|
|
||
|
|
#ifdef ABSL_HAVE_MEMORY_SANITIZER
|
||
|
|
|
||
|
|
#include <sanitizer/msan_interface.h>
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
|
||
|
|
__msan_unpoison(address, size)
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
|
||
|
|
__msan_allocated_memory(address, size)
|
||
|
|
|
||
|
|
#else // !defined(ABSL_HAVE_MEMORY_SANITIZER)
|
||
|
|
|
||
|
|
// TODO(rogeeff): remove this branch
|
||
|
|
#ifdef ABSL_HAVE_THREAD_SANITIZER
|
||
|
|
#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
|
||
|
|
do { \
|
||
|
|
(void)(address); \
|
||
|
|
(void)(size); \
|
||
|
|
} while (0)
|
||
|
|
#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
|
||
|
|
do { \
|
||
|
|
(void)(address); \
|
||
|
|
(void)(size); \
|
||
|
|
} while (0)
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) // empty
|
||
|
|
#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) // empty
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // ABSL_HAVE_MEMORY_SANITIZER
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Define IGNORE_READS_BEGIN/_END attributes.
|
||
|
|
|
||
|
|
#if defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
|
||
|
|
|
||
|
|
#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE \
|
||
|
|
__attribute((exclusive_lock_function("*")))
|
||
|
|
#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE \
|
||
|
|
__attribute((unlock_function("*")))
|
||
|
|
|
||
|
|
#else // !defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
|
||
|
|
|
||
|
|
#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE // empty
|
||
|
|
#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE // empty
|
||
|
|
|
||
|
|
#endif // defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Define IGNORE_READS_BEGIN/_END annotations.
|
||
|
|
|
||
|
|
#if ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED == 1
|
||
|
|
// Some of the symbols used in this section (e.g. AnnotateIgnoreReadsBegin) are
|
||
|
|
// defined by the compiler-based implementation, not by the Abseil
|
||
|
|
// library. Therefore they do not use ABSL_INTERNAL_C_SYMBOL.
|
||
|
|
|
||
|
|
// Request the analysis tool to ignore all reads in the current thread until
|
||
|
|
// ABSL_ANNOTATE_IGNORE_READS_END is called. Useful to ignore intentional racey
|
||
|
|
// reads, while still checking other reads and all writes.
|
||
|
|
// See also ABSL_ANNOTATE_UNPROTECTED_READ.
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_BEGIN() \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsBegin) \
|
||
|
|
(__FILE__, __LINE__)
|
||
|
|
|
||
|
|
// Stop ignoring reads.
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_END() \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsEnd) \
|
||
|
|
(__FILE__, __LINE__)
|
||
|
|
|
||
|
|
// Function prototypes of annotations provided by the compiler-based sanitizer
|
||
|
|
// implementation.
|
||
|
|
ABSL_INTERNAL_BEGIN_EXTERN_C
|
||
|
|
void AnnotateIgnoreReadsBegin(const char* file, int line)
|
||
|
|
ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE;
|
||
|
|
void AnnotateIgnoreReadsEnd(const char* file,
|
||
|
|
int line) ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE;
|
||
|
|
ABSL_INTERNAL_END_EXTERN_C
|
||
|
|
|
||
|
|
#elif defined(ABSL_INTERNAL_ANNOTALYSIS_ENABLED)
|
||
|
|
|
||
|
|
// When Annotalysis is enabled without Dynamic Annotations, the use of
|
||
|
|
// static-inline functions allows the annotations to be read at compile-time,
|
||
|
|
// while still letting the compiler elide the functions from the final build.
|
||
|
|
//
|
||
|
|
// TODO(delesley) -- The exclusive lock here ignores writes as well, but
|
||
|
|
// allows IGNORE_READS_AND_WRITES to work properly.
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_BEGIN() \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED( \
|
||
|
|
ABSL_INTERNAL_C_SYMBOL(AbslInternalAnnotateIgnoreReadsBegin)) \
|
||
|
|
()
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_END() \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED( \
|
||
|
|
ABSL_INTERNAL_C_SYMBOL(AbslInternalAnnotateIgnoreReadsEnd)) \
|
||
|
|
()
|
||
|
|
|
||
|
|
ABSL_INTERNAL_STATIC_INLINE void ABSL_INTERNAL_C_SYMBOL(
|
||
|
|
AbslInternalAnnotateIgnoreReadsBegin)()
|
||
|
|
ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE {}
|
||
|
|
|
||
|
|
ABSL_INTERNAL_STATIC_INLINE void ABSL_INTERNAL_C_SYMBOL(
|
||
|
|
AbslInternalAnnotateIgnoreReadsEnd)()
|
||
|
|
ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE {}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_BEGIN() // empty
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_END() // empty
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Define IGNORE_WRITES_BEGIN/_END annotations.
|
||
|
|
|
||
|
|
#if ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED == 1
|
||
|
|
|
||
|
|
// Similar to ABSL_ANNOTATE_IGNORE_READS_BEGIN, but ignore writes instead.
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_WRITES_BEGIN() \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesBegin)(__FILE__, __LINE__)
|
||
|
|
|
||
|
|
// Stop ignoring writes.
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_WRITES_END() \
|
||
|
|
ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesEnd)(__FILE__, __LINE__)
|
||
|
|
|
||
|
|
// Function prototypes of annotations provided by the compiler-based sanitizer
|
||
|
|
// implementation.
|
||
|
|
ABSL_INTERNAL_BEGIN_EXTERN_C
|
||
|
|
void AnnotateIgnoreWritesBegin(const char* file, int line);
|
||
|
|
void AnnotateIgnoreWritesEnd(const char* file, int line);
|
||
|
|
ABSL_INTERNAL_END_EXTERN_C
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_WRITES_BEGIN() // empty
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_WRITES_END() // empty
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Define the ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_* annotations using the more
|
||
|
|
// primitive annotations defined above.
|
||
|
|
//
|
||
|
|
// Instead of doing
|
||
|
|
// ABSL_ANNOTATE_IGNORE_READS_BEGIN();
|
||
|
|
// ... = x;
|
||
|
|
// ABSL_ANNOTATE_IGNORE_READS_END();
|
||
|
|
// one can use
|
||
|
|
// ... = ABSL_ANNOTATE_UNPROTECTED_READ(x);
|
||
|
|
|
||
|
|
#if defined(ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED)
|
||
|
|
|
||
|
|
// Start ignoring all memory accesses (both reads and writes).
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() \
|
||
|
|
do { \
|
||
|
|
ABSL_ANNOTATE_IGNORE_READS_BEGIN(); \
|
||
|
|
ABSL_ANNOTATE_IGNORE_WRITES_BEGIN(); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
// Stop ignoring both reads and writes.
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END() \
|
||
|
|
do { \
|
||
|
|
ABSL_ANNOTATE_IGNORE_WRITES_END(); \
|
||
|
|
ABSL_ANNOTATE_IGNORE_READS_END(); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
// ABSL_ANNOTATE_UNPROTECTED_READ is the preferred way to annotate racey reads.
|
||
|
|
#define ABSL_ANNOTATE_UNPROTECTED_READ(x) \
|
||
|
|
absl::base_internal::AnnotateUnprotectedRead(x)
|
||
|
|
|
||
|
|
namespace absl {
|
||
|
|
ABSL_NAMESPACE_BEGIN
|
||
|
|
namespace base_internal {
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
inline T AnnotateUnprotectedRead(const volatile T& x) { // NOLINT
|
||
|
|
ABSL_ANNOTATE_IGNORE_READS_BEGIN();
|
||
|
|
T res = x;
|
||
|
|
ABSL_ANNOTATE_IGNORE_READS_END();
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace base_internal
|
||
|
|
ABSL_NAMESPACE_END
|
||
|
|
} // namespace absl
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() // empty
|
||
|
|
#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END() // empty
|
||
|
|
#define ABSL_ANNOTATE_UNPROTECTED_READ(x) (x)
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Address sanitizer annotations
|
||
|
|
|
||
|
|
#ifdef ABSL_HAVE_ADDRESS_SANITIZER
|
||
|
|
// Describe the current state of a contiguous container such as e.g.
|
||
|
|
// std::vector or std::string. For more details see
|
||
|
|
// sanitizer/common_interface_defs.h, which is provided by the compiler.
|
||
|
|
#include <sanitizer/common_interface_defs.h>
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) \
|
||
|
|
__sanitizer_annotate_contiguous_container(beg, end, old_mid, new_mid)
|
||
|
|
#define ABSL_ADDRESS_SANITIZER_REDZONE(name) \
|
||
|
|
struct { \
|
||
|
|
alignas(8) char x[8]; \
|
||
|
|
} name
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) // empty
|
||
|
|
#define ABSL_ADDRESS_SANITIZER_REDZONE(name) static_assert(true, "")
|
||
|
|
|
||
|
|
#endif // ABSL_HAVE_ADDRESS_SANITIZER
|
||
|
|
|
||
|
|
// -------------------------------------------------------------------------
|
||
|
|
// Undefine the macros intended only for this file.
|
||
|
|
|
||
|
|
#undef ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
|
||
|
|
#undef ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED
|
||
|
|
#undef ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED
|
||
|
|
#undef ABSL_INTERNAL_ANNOTALYSIS_ENABLED
|
||
|
|
#undef ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED
|
||
|
|
#undef ABSL_INTERNAL_BEGIN_EXTERN_C
|
||
|
|
#undef ABSL_INTERNAL_END_EXTERN_C
|
||
|
|
#undef ABSL_INTERNAL_STATIC_INLINE
|
||
|
|
|
||
|
|
#endif // ABSL_BASE_DYNAMIC_ANNOTATIONS_H_
|